Car-wheel.



W. McGONWAY.

GAR WHEEL.

APPLICATION FILED APR. 14. 1909.

Patented Jam 18, 19 10.

UNITED STATES PATENT OFFICE.

WILLIAM MCCONWAY, OF PITTSBURG, PENNSYLVANIA.

CAR-WHEEL.

T all whom it may concern;

Be it known that I, WVILLIAM MoCoN WAY, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inCarlVheels; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to the construction of wheels which are especiallysuitable for use upon railway vehicles of all classes, and

r is particularly directed to the structural features of such a wheel.

The object of the present invention is to increase the strength anddurability of car wheels, and to produce cheap and simple car wheelswhich are of a composite or built up character.

In practicing my invention I employ a wheel center having acircumferentially channeled periphery which is divided into sections orsegments by a series of independent, peripheral projections which extendradially outward from said channeled seg ments sufliciently far toapproximately fit the inner circumference of least diameter of the tirewhich is to be applied thereto. The tire, which is also channeled on itsinner circumference, is heated and placed in proper relation to thewheel center, and molten metal is then poured into the annular spacebetween the wheel center and tire. As the segmental spaces formedbetween the wheel center, tire and radially extending, peripheralprojections are not wholly independent, but communicate through theopenings between the inner channeled circumference of the tire and theouter ends of the said peripheral projections, the metal thus castinplace forms a continuous ring at the completion of the castingoperation. As this cast filling ring shrinks in cooling, it breaks atthe points of weakness opposite the outer ends of the radially extendingprojections with which the wheel center is provided, thus forming intoindependent segmental fillers. The further cooling of these castsegmental filling members causes a shrinkage in the length thereofsufficient to permit them to be forced radially inward between theperipheral projections of the wheel center under the influence of thepressure due to the shrinkage of the tire. As the wheel Specification ofLetters Patent.

Application filed April 14, 1909.

Patented Jan. 18, 1910.

Serial No. 489,841.

center is maintained at a low temperature and as the tire is properlyheated to maintain intimate contact with the cast segmental fillersduring their shrinkage, the shrinkage of the tire compensates for theshrinkage of the fillers, and the latter ultimately have intimatecontact with the peripheral face of the wheel center as well as with theinner circumferential face of the tire, said tire and wheel center beingthus tightly secured to each other.

In the drawings chosen for the purpose of illustrating my invention, thescope whereof is pointed out in the claims, Figure l is a side elevationof a car wheel constructed in accordance with my invention; Fig. 2 is adetail radial section, taken in the plane of the line 22, Fig. 1; Fig. 3is a de tail radial section, taken in the plane of the line 33, Fig. 1;Fig. l is a detail, vertical section, taken in the plane of the line4l4l, Fig. 2; and, Fig. 5 is a detail, vertical section, taken in theplane of the line 55, Fig. 2.

Like symbols refer to like parts wherever they occur.

I will now proceed to describe my invention more fully, so that othersskilled in the art to which it appertains may apply the same.

In the drawings, A indicates the center member or wheel center, B thetire, and C the cast, segmental fillers by which these parts are securedto each other. For the sake of strength, the wheel center is preferablyformed of cast steel; in order to secure both strength and durability,the tire is preferably of rolled steel; and in order that the segmentalfillers shall not be appreciably compressed under the pounding action ofservice, which would result in the connection between the tire and wheelcenter becoming loose, said fillers are preferably formed of cast iron.

The wheel center A is formed with a hub 1, and its peripheral face 2 ispreferably channeled to have socketed engagement with the segmentalfillers C. As shown more particularly in Figs. 1, 2 and 3, it ispreferred that the peripheral face 2 shall be provided with a pluralityof parallel, circumferentially extending, circular channels the centersof which lie in the axis of the wheel.

The circumferentially channeled peripheral face 2 of the wheel center isdivided into separate segments by a series of peripheral projections 3which extend radially outward at preferably regular intervals from saidchanneled segments sufliciently far to fit approximately into the inner,clear, circular opening of the tire B. These peripheral projections 3*are, as shown, preferably formed with sides which taper or converge in aradially outward direction, the taper being such that the inclined sidesmeet in a thin edge at the outer end of each of said projections. Bysuch a construction of the peripheral projections 3, the segmentalspaces formed between the channeled periphery of the wheel center A andthe inner circumferential face of the tire B before the fillers C arecast in place are rendered wedge-like in form, and the fillers C, when*ast, are insured a corresponding inward taper.

The tire B, which is concentrically arranged with respect to the wheelcenter A, is preferably formed with continuous, circular channels on itsinner circumferential face 1 which correspond with the circumferentiallyextending segmental channels on the periphery 2 of the wheel center. Theclear opening in the center of the tire is preferably such that theradial spurs or peripheral projections 3 of the wheel center contact orclosely approach the tire in the completed wheel. The tread of the tiremay be of the usual or any desired form.

The independent, metal fillers C, which are cast in place between thewheel center A and tire B, conform to the opposed, channeled faces ofthe said wheel center and tire and have socketed, interlockingengagement with each, as will be readily understood.

hen a heated tire of the form described is placed in proper relationwith a wheel center of the construction pointed out, and

molten cast iron is poured in the segmental spaces formed between saidwheel center and tire, the shrinking of the tire, following the ruptureof the cast iron filling ring into independent fillers C, as beforedescribed, forces said fillers, as they continue to shrink in cooling,between the inclined faces of adjacent peripheral projections 3, thuscompensating for looseness due to shrinkage and insuring intimatecontact of each of the fillers C with the wheel center A andtire B.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. In a car wheel, the combination with a wheel center provided with achanneled periphery which is divided into sections by peripheralprojections, of a tire which is continuously channeled on its innercircumference, and means interposed between and connecting said wheelcenter and tire, said means having socketed engagement with thechanneled periphery of the wheel center and with the channeled innercircumference of the tire.

2. In a car wheel, the combination with a wheel center which is providedwith a plurality of radially extending peripheral projections, of a tireof uniform cross section adapted to encircle said wheel center, andfillers interposed between said wheel center and tire.

3. In a car wheel, the combination with a wheel center provided withtapering pcripheral projections, of a tire adapted to encircle saidwheel center, and fillers interposed between said wheel center and tire.

41-. In a car wheel, the combination with a wheel center provided with achanneled periphery which is divided into segments by radially extendingperipheral projections having inclined faces, of a tire which ischanneled on its inner circumference, and cast metal fillers interposedbetween said wheel center and tire and having socketed engagement witheach.

5. In a car wheel, the combination with a wheel center, of a tire ofuniform cross section encircling the same and arranged in spacedrelation thereto, one of said members being provided with projectionsextending toward the other, and means interposed between and connectingsaid wheel center and tire.

6. In a car wheel, the combination with a wheel center having achanneled periphery, of a tire arranged in spaced relation thereto andhaving a continuously channeled inner circumferential face, one of saidmembers being provided with projections extending toward the other andsubstantially bridging the space between them and a metal filling castin place between said wheel center and tire and having socketedengagement with each.

In testimony whereof I affix my signature, in presence of twosubscribing witnesses.

WILLIAM MCCONIVAY. IVitnesses F. D. Eonnn, J. HARTLEY.

